Ball o' String Wario is one of Wario's transformations in Wario Land 3. Getting covered in Silky's or Anonster's spider silk turns the player into Ball o' String Wario, a rolling yellow yarn ball. In this form the player rolls back and forth across a level, bouncing off walls, until they eventually unravel back into Wario. In this state, the player can break through yarn blocks.